US3374435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of the effect of impulse noise bursts
Assignee: AT&T Inc
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Filing: 1965-07-29
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Granted: 1968-03-19
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Expires: 1985-07-29
Abstract
No abstract record available.
Inventors
- 👤 Joel S Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:36
CPC Classifications
H; H04; H04L; H04L1/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
IN COMBINATION WITH A DATA TRANSMISSION SYSTEM SUBJECT TO IMPULSE NOISE, MEANS FOR REDUCING THE EFFECT OF SUCH IMPULSE NOISE ON A RECEIVED DATA SIGNAL COMPRISING MEANS FOR REGENERATING THE TRANSMITTED DATA SIGNAL WAVESHAPE FOR EACH INDIVIDUAL DEMODULATED DATA BIT, MEANS SUBTRACTING EACH REGENERATED DATA BIT FROM THE TOTAL RECEIVED SIGNAL TO OBTAIN AN ESTIMATE OF THE NOISE ADDED BY SAID TRANSMISSION SYSTEM, MEANS RESPONSIVE TO THE NOISE FROM SAID SUBTRACTING MEANS EXCEEDING A PREDETERMINED MINIMUM LEVEL FOR GENERATING AN ESTIMATED NOISE BURST LOCKED IN PHASE AND TIME OF OCCURRENCE WITH THE ONSET ONLY OF A TRUE NOISE BURST, AND MEANS TAKING THE DIFFERENCE BETWEEN SAID ESTIMATED NOISE BURST AND THE TOTAL RECEIVED SIGNAL TO OBTAIN A RECEIVED DATA SIGNAL SUBSTANTIALLY FREE OF IMPULSE NOISE.
References Cited (Backward Citations)
US2784256A
Cited
US3322968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |